CCDA Exam Quick-Study - Network Life Cycle

8/13/2019 CCDA Exam Quick-Study - Network Life Cycle

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Network Life Cycle

Created by Michael Law


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Citations Teare, Diane, 2008. Authorized Self-Study Guide:

Designing for Cisco Internetwork Solutions (DESIGN),Second Edition. 800 East 96thStreet, Indianapolis,Indiana 46240 USA: Cisco Press

Cisco Systems, Inc


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Network Life CyclePrepare

Plan

Design

Implement

Operate

Optimize


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Prepare Phase Identify customerrequirements.

Develop network strategy.

Propose high-level conceptual architecture. Identify technologies that will be implemented.

Assess the scope of the network design project.

Identifying required information.

Understanding organizational goals/constraints andtechnical goals/constraints.


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Prepare Phase - ExtensionIdentification Hierarchy

Organizational Goals

Add NewCustomerServices

ImproveCustomerSupport

Reduce Costs

IncreaseCompetiveness

OrganizationalConstraints

Budget

Personnel

Policies

Schedule

Technical Goals

ImproveNetwork

Performance

ImproveSecurity andReliability

DecreaseExpected

Downtime

ModernizeOutdated

Technology

Technical Constraints

ExistingEquipment

BandwidthAvailability

ApplicationAvailability

Lack ofQualifiedPersonnel


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Plan Phase Identifying networkrequirements.

Assess locations and existing network information.

Perform gap analysis to determine if existinginfrastructure can support proposed system.

This will manage tasks, responsibilities, criticalmilestones and resources required to implement.

The output of this phase is a set of networkrequirements.


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Design Phase Design will be based on the requirements identified in

the plan phase.

Gather information from customer input, networkaudit, traffic analysis and network health checklist.

A detailed design of the network is createsdocumentation for infrastructure, services and

applications to be used. Create topological maps


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Design Phase - Extension Reviewing existing documentation including hardware,

software, configuration and location of devices and cabling. Obtain verbal input about network to determine impression

of network.

CustomerInput

Perform audit to judge against customer input of network. Reveals information about network including hardware,

configuration and verification of existing documentation.

NetworkAudit

Verifies set of applications currently on the network. Alsomay reveal additional traffic unknown from the first twosteps.

Reveal importance of traffic, priority and security.

TrafficAnalysis


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Implement Phase The network is built according to the design

specifications.

Integrate devices without disruption or creating apoint of vulnerability.

Sub-phases of the implementation phase are listed inorder: description of step, reference to design,

implementation guidelines, rollback guidelines,estimated time needed for implementation.

Verification of design is found in the implementationphase.


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Operate Phase Maintain the networks health on a day-to-day basis.

Fault detection-and-correction and performance

monitoring occurs in the operate phase. Monitor the network for errors and problems.


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Optimize Phase Proactive network management. Identify and resolve

problems before they occur.

Reactive fault correction occurs when proactivemanagement cannot predict and mitigate failures.

The optimize phase may lead to network re-design iftoo many errors occur.

CCDA Exam Quick-Study - Network Life Cycle

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